/Engine/Source/Editor/BehaviorTreeEditor/Public/BehaviorTreeEditor.h
Delegate handler for when a blackboard key changes (added, removed, renamed)
void HandleBlackboardKeyChanged ( [UBlackboardData](API\Runtime\AIModule\BehaviorTree\UBlackboardData) * InBlackboardData, [FBlackboardEntry](API\Runtime\AIModule\BehaviorTree\FBlackboardEntry) *const InKey )